Which herbicide is effective against difficult to control weeds like horsetail?

Chlorsulfuron is recognized as an effective herbicide against difficult-to-control weeds such as horsetail. This effectiveness is largely attributed to its residual activity and its ability to inhibit the growth of certain broadleaf plants and some grasses. Chlorsulfuron works by blocking the enzyme pathway that leads to plant growth, resulting in the suppression of these tough weeds. This makes it particularly useful in areas where horsetail is prevalent, as it can provide long-lasting control and help manage populations that are otherwise resilient to other types of herbicides.

In contrast, glyphosate, while a broad-spectrum herbicide, may not effectively control horsetail due to its perennial nature and method of growth. Similarly, chlorimuron and 2,4-D are not the first choice for dealing with horsetail, as they target a different spectrum of weeds and may not address the specific growth characteristics and resilience of horsetail. Thus, chlorsulfuron's unique mode of action and effectiveness in similar situations highlights why it is the correct choice for managing such challenging weeds.